jQuery Speed Test: $(this) vs .get() vs .eq()

Each loop cache performance – test to see if grabbing the current element from inside the each is possible/faster from a cached array of elements. Namely $(this) vs .get() vs .eq() with .text() and textContent/innerText. Tests run with jQuery 1.9.1. Similar to: jQuery Speed Test: $(this).attr(“id”); vs this.id .

• .get() and .eq() both return a single “element” from a jQuery object array, but they return the single element in different forms.
• .eq() returns it as a jQuery object, meaning the DOM element is wrapped in the jQuery wrapper, which means that it accepts jQuery functions.
• .get() return a raw DOM element. You may manipulate it by accessing its attributes and invoking its functions as you would on a raw DOM element. But it loses its identity as a jQuery-wrapped object, so a jQuery function like .fadeIn won’t work.

Setup

list


nested 1
nested 2
nested 3


list


nested 1
nested 2
nested 3

list

nested 1
nested 2
nested 3

list



  Benchmark.prototype.setup = function() {
    MY_OBJECT = 
        {
            cache: {},
            init: function()
            {
                this.cache.c = $('#container');
                this.cache.n = this.cache.c.find('.nested');
    this.cache.s = this.cache.c.find('#status');
            }
        }
    MY_OBJECT.init();
  };

Tests

$.each(MY_OBJECT.cache.n, function(i, v)
{
    MY_OBJECT.cache.s.text($(this).text());
});
$.each(MY_OBJECT.cache.n, function(i, v)
{
    MY_OBJECT.cache.s.text(MY_OBJECT.cache.n.eq(i).text());
});
$.each(MY_OBJECT.cache.n, function(i, v)
{
    MY_OBJECT.cache.s.text(MY_OBJECT.cache.n.get(i).textContent);
});

Frequently Asked Questions (FAQs) about jQuery eq() Method